syzkaller login: [ 31.154131] BUG: Bad rss-counter state mm:000000003c26de10 type:MM_FILEPAGES val:33 [ 31.155352] BUG: Bad rss-counter state mm:000000003c26de10 type:MM_ANONPAGES val:22 [ 31.198325] ================================================================== [ 31.199438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.200560] Read of size 8 at addr ffff888019c87310 by task sshd/220 [ 31.201155] [ 31.201326] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.201994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.202742] Call Trace: [ 31.202991] [ 31.203213] dump_stack_lvl+0x91/0xf0 [ 31.203597] print_report+0xcc/0x620 [ 31.203972] ? __virt_addr_valid+0x102/0x340 [ 31.204402] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204870] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205331] kasan_report+0xbe/0xf0 [ 31.205683] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206141] vma_interval_tree_remove+0xc75/0xec0 [ 31.206592] vma_prepare+0xc54/0x11a0 [ 31.206957] __split_vma+0x5af/0x950 [ 31.207317] ? __pfx___split_vma+0x10/0x10 [ 31.207726] ? find_held_lock+0x2c/0x110 [ 31.208133] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.208579] ? lock_is_held_type+0x9f/0x120 [ 31.208999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.209464] ? mtree_range_walk+0x632/0x900 [ 31.209898] ? mas_walk+0x5c7/0x7c0 [ 31.210263] do_vmi_munmap+0x1f1/0x2b0 [ 31.210645] mmap_region+0x1f9/0x2660 [ 31.211028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.211447] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.212000] ? __pfx_lock_acquire+0x10/0x10 [ 31.212443] ? __pfx_mmap_region+0x10/0x10 [ 31.212788] ? security_mmap_addr+0x7d/0xa0 [ 31.213084] ? get_unmapped_area+0x1f5/0x3f0 [ 31.213385] do_mmap+0x854/0xf00 [ 31.213626] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.213900] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.214210] ksys_mmap_pgoff+0x3af/0x500 [ 31.214492] do_syscall_64+0x3f/0x90 [ 31.214758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215116] RIP: 0033:0x7f191ae82d82 [ 31.215372] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.216552] RSP: 002b:00007ffe7b1e94b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.217057] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f191ae82d82 [ 31.217522] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f191a2bc000 [ 31.217988] RBP: 00007f191a2bc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.218446] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be5558ff70 [ 31.218911] R13: 00007ffe7b1e94d0 R14: 00007ffe7b1e9500 R15: 00007ffe7b1e9860 [ 31.219397] [ 31.219563] [ 31.219681] Allocated by task 213: [ 31.219920] kasan_save_stack+0x22/0x50 [ 31.220197] kasan_set_track+0x25/0x30 [ 31.220470] __kasan_slab_alloc+0x59/0x70 [ 31.220759] kmem_cache_alloc+0x16b/0x370 [ 31.221048] vm_area_dup+0x20/0x160 [ 31.221301] __split_vma+0x170/0x950 [ 31.221559] split_vma+0xc6/0x110 [ 31.221803] mprotect_fixup+0x8d2/0xb30 [ 31.222093] do_mprotect_pkey+0x87e/0xd40 [ 31.222405] __x64_sys_mprotect+0x78/0xc0 [ 31.222707] do_syscall_64+0x3f/0x90 [ 31.222982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223372] [ 31.223498] Freed by task 213: [ 31.223736] kasan_save_stack+0x22/0x50 [ 31.224033] kasan_set_track+0x25/0x30 [ 31.224323] kasan_save_free_info+0x2b/0x50 [ 31.224633] __kasan_slab_free+0x10a/0x190 [ 31.224949] kmem_cache_free+0x10d/0x4d0 [ 31.225248] rcu_core+0x8c8/0x2860 [ 31.225514] __do_softirq+0x1b7/0x7d4 [ 31.225799] [ 31.225923] Last potentially related work creation: [ 31.226265] kasan_save_stack+0x22/0x50 [ 31.226561] __kasan_record_aux_stack+0x8e/0xa0 [ 31.226892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.227269] remove_vma+0x139/0x170 [ 31.227527] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.227856] do_vmi_munmap+0x1f1/0x2b0 [ 31.228132] __vm_munmap+0x138/0x3a0 [ 31.228399] __x64_sys_munmap+0x59/0x80 [ 31.228693] do_syscall_64+0x3f/0x90 [ 31.228972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.229342] [ 31.229473] The buggy address belongs to the object at ffff888019c872b8 [ 31.229473] which belongs to the cache vm_area_struct of size 168 [ 31.230344] The buggy address is located 88 bytes inside of [ 31.230344] freed 168-byte region [ffff888019c872b8, ffff888019c87360) [ 31.231177] [ 31.231308] The buggy address belongs to the physical page: [ 31.231700] page:00000000fdf28759 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c87 [ 31.232326] memcg:ffff888014566901 [ 31.232585] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.232946] page_type: 0xffffffff() [ 31.233201] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.233728] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014566901 [ 31.234249] page dumped because: kasan: bad access detected [ 31.234614] [ 31.234745] Memory state around the buggy address: [ 31.235079] ffff888019c87200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.235586] ffff888019c87280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.236094] >ffff888019c87300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.236609] ^ [ 31.236883] ffff888019c87380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.237385] ffff888019c87400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.237876] ================================================================== [ 31.238611] Disabling lock debugging due to kernel taint [ 33.629061] BUG: Bad rss-counter state mm:00000000f9a304c6 type:MM_FILEPAGES val:33 [ 33.630044] BUG: Bad rss-counter state mm:00000000f9a304c6 type:MM_ANONPAGES val:22 [ 34.133177] BUG: Bad rss-counter state mm:00000000032ede0f type:MM_FILEPAGES val:33 [ 34.134383] BUG: Bad rss-counter state mm:00000000032ede0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7120' (ECDSA) to the list of known hosts. 2023/06/21 06:21:03 fuzzer started 2023/06/21 06:21:03 dialing manager at localhost:36067 2023/06/21 06:21:03 checking machine... 2023/06/21 06:21:03 checking revisions... [ 34.873179] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:21:04 testing simple program... [ 34.928161] cgroup: Unknown subsys name 'net' [ 35.005095] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:21:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=0000561c2a436c78 CR3=00000000165c0000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2033303a31323a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a31323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff818a8228 RCX=0000000000000001 RDX=1ffff1100189aede RSI=ffff88800c4d7ae8 RDI=ffffffff818a8228 RBP=ffffffff818a8228 RSP=ffff88800c4d7650 R8 =0000000000000001 R9 =ffff88800c4d76d8 R10=0000000000038001 R11=00000000000229c7 R12=ffff88800c4d7760 R13=0000000000000000 R14=ffff888015f38000 R15=0000000000000dc0 RIP=ffffffff811fc6f0 RFL=00000292 [--S-A--] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdaed268900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fdaed8200b0 CR3=000000000e73e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000